Growing up listening to my transistor radio I listened to top 40 radio and it was great, Aretha Franklin, Beatles, Four Tops, Beach Boys and so on. As I moved from transistor radio to albums and a full on stereo in the 70's I bought many artist I had never heard of. Such names as Delbert and Glen, an obscure due from the early 70's that a friend told me about Stick Man was his nickname. Delbert and Glen were a folky, country, country rock, with a bit of R&Bish sound. The band was from Texas as I recall. Artist like Bonnie Raitt recorded a song off their 1st lp. The Blues Brothers did one as well. To my ears their second lp Subject to Change is the better of the two with classic tracks like Cold November, California Livin', If you don't leave me a lone (I find somebody who will). I still listen to this lp. Turns out years later Delbert McClinton was the Delbert in the band and he had a top 40 hit in 1978 or there about with Givin' It Up for Love.
In 1971 or so when I picked up Subject to Change it was not easy to find outside any large city. Now you can search and find them easily.
Take a listen.